package cnblogs4;
/*
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */ 

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigDecimal;
import java.io.EOFException;

public class DataStreams {
    //static final String dataFile = "invoicedata";
	//    static final double[] prices = { 19.99, 9.99, 15.99, 3.99, 4.99 };
//    static final int[] units = { 12, 8, 13, 29, 50 };
//    static final String[] descs = { "Java T-shirt",
//            "Java Mug",
//            "Duke Juggling Dolls",
//            "Java Pin",
//            "Java Key Chain" };

	static final String dataFile = "Studentsdate";
	static final String[] name={"zhang","lin","zheng"};
	static final int[] age={21,23,12};
	static final BigDecimal[] score={new BigDecimal("100.00"), 
	        new BigDecimal("67.00"),
	        new BigDecimal("89.00")};

    public static void main(String[] args) throws IOException , ClassNotFoundException{

 
    	ObjectOutputStream out = null;
        
        try {
            out = new ObjectOutputStream(new
                    BufferedOutputStream(new FileOutputStream(dataFile)));

            for (int i = 0; i < age.length; i ++) {
                out.writeUTF(name[i]);
                out.writeInt(age[i]);
                out.writeObject(score[i]);
            }
        } finally {
            out.close();
        }

        ObjectInputStream in = null;
        //double total = 0.0;
        try {
        	in = new ObjectInputStream(new
                    BufferedInputStream(new FileInputStream(dataFile)));

//            double price;
//            int unit;
//            String desc;
            String name;
            int age;
            BigDecimal score;

            try {
                while (true) {
                	name = in.readUTF();
                    age = in.readInt();
                    score = (BigDecimal)in.readObject();
                    //System.out.format("You ordered %d units of %s at $%.2f%n",
                            //unit, desc, price);
                    //total += unit * price;
                    System.out.println(name+" "+age+" "+score);
                }
            } catch (EOFException e) { }
            //System.out.format("For a TOTAL of: $%.2f%n", total);
        }
        finally {
            in.close();
        }
    }
}
